
.gray {
	filter: grayscale(100%);//IE浏览器
	-webkit-filter: grayscale(100%);//谷歌浏览器
	-moz-filter: grayscale(100%);//火狐
	-ms-filter: grayscale(100%);
	-o-filter: grayscale(100%);
	filter:progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);
	-webkit-filter: grayscale(1);//谷歌浏览器
}

a:link{
	text-decoration:none;
}
a:visited{
	text-decoration:none;
}
a:hover{
	text-decoration:none;
}
a:active{
	text-decoration:none;
}